 /*******************************************************************************
  * Copyright (c) 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  ******************************************************************************/

 package org.eclipse.core.databinding.observable.list;

 /**
  * A single addition of an element to a list or removal of an element from a list.
  *
  * @since 1.0
  */
 public abstract class ListDiffEntry {
     
     /**
      * @return the 0-based position of the addition or removal
      */
     public abstract int getPosition();
     
     /**
      * @return true if this represents an addition, false if this represents a removal
      */
     public abstract boolean isAddition();
     
     /**
      * @return the element that was added or removed
      */
     public abstract Object getElement();
     
     /**
      * @see java.lang.Object#toString()
      */
     public String toString() {
         StringBuffer buffer = new StringBuffer ();
         buffer
             .append(this.getClass().getName())
             .append("{position [") //$NON-NLS-1$
 .append(getPosition())
             .append("], isAddition [") //$NON-NLS-1$
 .append(isAddition())
             .append("], element [") //$NON-NLS-1$
 .append(getElement() != null ? getElement().toString() : "null") //$NON-NLS-1$
 .append("]}"); //$NON-NLS-1$

         return buffer.toString();
     }
 }

